David explains: “The paper proposes a completely new way of measuring the magnetic pitch angle in a tokamak plasma. The magnetic pitch angle is an extremely important parameter in fusion research as it is directly linked to the stability of the plasma's edge. Despite its importance, it is a very difficult parameter to measure. My research points to a route forward to making rapid and accurate measurements of the pitch angle. These measurements can be used in the future to help develop new models of plasma edge stability."

An article from Niek den Harder of EUROfusion and Dutch institute DIFFER, involving a group of colleagues at JET, is also in the collection, which recognises papers that have generated a particular interest in the worldwide fusion community and with the journal’s referees. The den Harder work looks at how the plasma in JET erodes tungsten in the tokamak's exhaust system, the divertor – a key issue for the ITER experiment.